Through a little confusion and lack of research, we have a 3583 library
where we have mixed LTO1 and LTO3 media. Apparently we read that TSM and
the 3583 supports "mixed-media with LTO" and didn't read the fine print,
thinking it would just work. The drives and cartridges are in a single
device class (format=drive) all in the same storage pool. Surprisingly this
has been working fine for a few months. I have 4 LTO-1 drives in slots 1-4,
and 2 LTO-3 drives in slots 5-6.
After a backup failure, i noticed TSM trying to mount an LTO3 cartridge in
an LTO1 drive. Further research showed that our setup should not work at
all haha. I've determined the best course of action now is to partition
into 2 logical libraries. One library for LTO-1 media, one for LTO-3
media. Having never done this before, i have a few questions.
1. Are the 3583 partitioning configurations "fixed"? I don't see a way to
assign a particular drive to a particular partition. If it is a fixed
config, then according to the operator guide, when you define 2 logical
libaries, drive slots 1 and 2 are in library A, and slots 3-6 are in library
B. If this is true, i'll have to physically move the LTO-3 drives to slots
1 and 2. Am i following this correctly?
2. Library is connected to a p5-570 running AIX 5.3. Right now the library
is /dev/smc0. After partitioning, will i get a smc0 and an smc1? Should i
run cfgmgr after partitioning?
3. What is the best procedure to do the partition? I'm thinking i need to
checkout all the cartridges, then turn off the library. Move the tape
drives, then partition the library. Then deal with the AIX devices changing
(rmdev/cfgmgr). Then redefine drives/paths, define new device classes and
checkin the cartridges to the right logical library. Am i missing anything?
We're running TSM 220.127.116.11. Thanks for any info. I appreciate it.
Ray DeJean http://www.r-a-y.org
Systems Engineer Southeastern Louisiana University
IBM Certified Specialist AIX Administration, AIX Support